<template>

  <div>
    问答
    <input v-model="aa" type="text" name="" id="">
  </div>
</template>

<script>
export default {
  data () {
    return {
      aa: ''
    }
  },
  watch: {
    aa (a, b) {
      console.log(a + '------' + b)
    }
  }
}
</script>

<style>
</style>
